1. Randomized study of surgery for patients with permanent atrial fibrillation as a result of mitral valve disease 
Gustavo Glotz de Lima, MD, PhD, Renato A.K Kalil, MD, PhD, Tiago L.L Leiria, MD, Domingos M Hatem, MD, MS, Claudio L Kruse, MD, Rogério Abrahão, MD, João R.M Sant'anna, MD, PhD, Paulo R Prates, MD, Ivo A Nesralla, MD, PhD 
The Annals of Thoracic Surgery 
Volume 77, Issue 6, Pages (June 2004)
DOI: /j.athoracsur

2. Fig 1
Posterior view of the heart after the procedure, showing the isolation of the pulmonary veins. (Reprinted with permission from The Society of Thoracic Surgeons [Ann Thorac Surg 2002, 73, 1169–73] [23].)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

3. Fig 2
Kaplan-Meier chart showing the proportional number of patients in sinus rhythm as a function of time, in accordance with the surgical technique. (PVI = isolation of pulmonary veins.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )